Writing feel improving sheet

Abstract

A writing feel improving sheet having a touch pen contact surface with which a touch pen comes into contact, the touch pen contact surface having an indentation depth of 10 μm or more and 30 μm or less when a test load reaches 1961 mN upon indentation with a tip of a triangular pyramid-shaped indenter at a load speed of 1 mN/s, the triangular pyramid-shaped indenter having a tip curvature radius of 100 nm and an inter-ridge angle of 115°.

1 . A writing feel improving sheet having a touch pen contact surface with which a touch pen comes into contact,
 the touch pen contact surface having an indentation depth of 10 μm or more and 30 μm or less when a test load reaches 1961 mN upon indentation with a tip of a triangular pyramid-shaped indenter at a load speed of 1 mN/s, the triangular pyramid-shaped indenter having a tip curvature radius of 100 nm and an inter-ridge angle of 115°.   
     
     
         2 . The writing feel improving sheet according to  claim 1 , having a dynamic friction coefficient of 0.11 or more and 0.62 or less when, after a pen tip of a touch pen is brought into contact with the touch pen contact surface, a load of 200 g is applied to the touch pen and the touch pen is linearly slid at a speed of 1.6 mm/s while maintaining an angle formed between the touch pen and the touch pen contact surface at 45°, the pen tip having a diameter of 0.5 mm. 
     
     
         3 . The writing feel improving sheet according to  claim 1 , comprising:
 a writing feel improving layer;   a base material provided on one surface side of the writing feel improving layer; and   a pressure sensitive adhesive layer provided on a surface side of the base material opposite to the writing feel improving layer,   wherein the touch pen contact surface is a surface of the writing feel improving layer opposite to the base material.   
     
     
         4 . The writing feel improving sheet according to  claim 3 , wherein the writing feel improving layer is laminated directly on one surface of the base material. 
     
     
         5 . The writing feel improving sheet according to  claim 3 , wherein the writing feel improving layer is a hard coat layer. 
     
     
         6 . The writing feel improving sheet according to  claim 2 , comprising:
 a writing feel improving layer;   a base material provided on one surface side of the writing feel improving layer; and   a pressure sensitive adhesive layer provided on a surface side of the base material opposite to the writing feel improving layer,   wherein the touch pen contact surface is a surface of the writing feel improving layer opposite to the base material.   
     
     
         7 . The writing feel improving sheet according to  claim 6 , wherein the writing feel improving layer is laminated directly on one surface of the base material. 
     
     
         8 . The writing feel improving sheet according to  claim 4 , wherein the writing feel improving layer is a hard coat layer. 
     
     
         9 . The writing feel improving sheet according to  claim 6 , wherein the writing feel improving layer is a hard coat layer. 
     
     
         10 . The writing feel improving sheet according to  claim 7 , wherein the writing feel improving layer is a hard coat layer.